Yoko

S1 E2: On board the train, Yoko confronts the Colonel and is sheltered by the Siberian Tiger who brings Adam to her. They are confronted at gun point by a drunk and a train conductor who are also undercover spies. Everyone except Yoko is killed, as the Siberian Tiger's treachery plays out. Yoko recovers and the trio bonds. With Hazuki, they take down the Siberian Tiger. They find the hidden explosive and hand over the decoder at their destination.